Separation of borax from potassium salts



id WATENT OFFlCE.

CLINTQN E. IDOLIBEAE, OF SAN FRANCISCO, GALIFORNIA, ASSIGIQ'OR T0 INDUSTRIAL BEfiEAB-CH 70., OF SAN FRANCISCQ, CMJII'FQRNIA; ABUSINESS ASSOCIATION.

SEE'ABATIGN 0F BORAX FEE-0M POTASSIUM SALTS.

No Drawing.

To all to 710m it may concern:

Be it known that I, CLINTON E. DOLBEAR, a citizen of the United States, residing at tl e city and county of San Francisco and State or California, have invented certain new and useful Improvements in the Separation of Borax'trom Potassium Salts, of which the itfollowing is a s )ecification.

My invention. relates to and has-for its object the separation of bOl'tlX and other deleterious substances from potassium salts subieoted to spinning in a centrituge, the' liquor containing the horas; 111 solution Hill be eii ectually separated trom the potassium salt; and it, while being whirled in thereutriiuge, the potassium salt is sprayed with a small amount or hot water, the borax content will be reduced to a more trace, too small to be harmful. Carbonate and sulfate of soda, if present, are also eliminated from the potassium salt, in the same manner and at the same time.

By this procedure, potassium salt from Searles Lake brine can be directly crystallized from the hot concentrated brine, the crystallized mass drained of excess of mother liquor, heated and then spun in a centrifuge, and washed with a hot water spray.

The potassium salt remaining in the cen trituge is naturally of higher grade than before being spun, and contains sodium chlorid only, in appreciable quantity as an impurity. The liquor thus separated from the potassium salts contains practically all the borax in concentrated condition.

If this hot liquor is then diluted to a point where it will not crystallize until it has cooled to a transition point at or below 63 degrees (3., it will when cooled to crystallization yield borax in very pure condition, while any potassium salt present will remain dissolved in the mother liquor. This mother liquor can then be separated from Specification of Letters @atent. Patented Jun 28 1921 Application filed Uctober 28, 3.920. fierial No. 4:19,?51.

the borax crystals and returned to the evaporator for further concentration, to repover the contained potassium salts and ooraz.

l. The process of separating borax from mixtures of potassium salts and boraX, which consists in heating the mixture in moist condition; and separating the resultant liquor with it's dissolved content. from the undissolved salts.

The process of separating borax from mixtures of potassium salts and borax, which consists in heating the mixture in moist condition; and separating the resultant liquor with its dissolved content, from the undissolved salts, by subjecting the mixture to centrifugal action.

3. The process of separating borax from mixtures of potassium salts and borax, which consists in heating, the mixture in moist condition until the horax is dissolved in the resultant liquor; and then separating said liquor with its borax content from the undissolved potassium salts.

l. The process of separating borax from mixtures of potassium salts and borax, which consists in heating the mixture in moist condition until the borax is dissolved in the resultant liquor; and then subjecting said mixture to centrifugal action to sepa-. rate the liquor with its box-ax content, from the undissolved salts.

5. The process of separating borax from mixtures of potassium salts and borax, which consists in heating the mixture in moist condition until the borax is dissolved in the resultant liquor; separating the liquor with its borax content from the undissolved potassium salts; and washing said salts with a spray of hot water.

(i. The process of separating borax from mixtures of potassium salts and borax, which consists in heating the mixture in moist condition until the borax is dissolved in the resultant liquor; subjecting the mixture to centrifugal action to separate the liquor with its borax content, from the un dissolved potassium salts; and washing said' salts during centrifuging with a spray of hot water.

7. llhc process of treating potassium and borax bearing brines, which consists in concentrating and cooling the brine to deposit salt mixtures; draining the deposited salt mixtures of an borax bearing brines,

. heating the excess of mother liquor; heating the moist mixture until the borax is redissolved in the resultant liquor; and separating the said liquor with its borax content from the undissolved potassium salts.

8. The process of treating potassium and borax bearing brines, which consists in concentrating and cooling the brine to deposit salt mixtures; draining the deposited salt mixtures of an excess of mother liquor; moist mixture until the borax is redissolved in the resultant liquor; separating the said liquor. with its loorax content from the undissolved potassium salts and Washing said sal s with a spray of hot water.

9. The proces of treating potassium and which consists in conthe brine to deposit deposited salt liquor;

centrating and cooling salt mixtures; drainlng the i IIllXtllIES oi an excess oi": mother triiiuging with a spray messes moist mixture until the hora-x is redissolved in the resultant liquor; and separating the said liquor with its borax content from the undissolved' potassium salts by subjecting the mixture to centrifugal action.

10. The process of treating potassium and borax bearing brines, which consists in concentrating and cooling the brine to deposit salt mixtures; draining the deposited salt mixtures of an excess oi mother liquor; heating the moist mixture until the borax is redissolved in the resultant liquor; separating the said liquor with its borax content from the undissolved potassium salts, by subjecting the mixture to centrifugal action; and Washing said Salts during cen- 7 of hot water.

In testimony W'lie'reoi l. have signed name to this specification.

CLlllTON E. DOLBEAR.

heating the 

